void display()
{
const int win_width = glutGet(GLUT_WINDOW_WIDTH);
const int win_height = glutGet(GLUT_WINDOW_HEIGHT);
const float win_aspect = (float)win_width / (float)win_height;
glViewport(0, 0, win_width, win_height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(win_aspect > RATIO) {
glOrtho(-win_aspect, win_aspect, -1., 1., -1., 1.);
} else {
glOrtho(-RATIO, RATIO, -RATIO/win_aspect, RATIO/win_aspect, -1., 1.);
}
glMatrixMode(GL_MODELVIEW);
glClearColor(0., 0., 1., 1.);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_QUADS);
glColor3f(1,1,1);
glVertex2f(-RATIO, -1);
glVertex2f(RATIO, -1);
glVertex2f(RATIO, 1);
glVertex2f(-RATIO, 1);
glEnd();
draw_bricks();
paddle_draw();
ball_draw();
glutSwapBuffers();
// GLUT doesn't offer cross plattform timing
// assume 60Hz refresh rate
T_last_frame = 1./60.;
}
void boucle_principal(t_bal *bal, t_brick *brick, t_env *e)
{
t_seg s;
while (1)
{
if (map_end(e))
change_map(e);
if (glfwWindowShouldClose(e->window))
break ;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
draw_bricks(e, brick);
draw_seg(&s, e);
if (e->space == 0)
bal->x1 = e->x_bar + 0.125;
draw_circle(bal, e);
draw_barre(e->x_bar, -0.90);
if (e->space == 1 && e->pauz == 1)
move_bal(bal, e);
glfwSwapBuffers(e->window);
glfwPollEvents();
}
}
/* Called every animation frame to move all of the power boxes down and perform
* collision detection, etc. Doesn't draw the results to the canvas unless the
* power collides with something and is destroyed. */
void animate_powers(nbstate *state)
{
sprite *s;
power *p, *pnext;
/* For each power in the list: */
for(p = state->powers; p; p = pnext) {
/* Remember the next item first, because we may destroy this
* power, and then it would be wrong to use the pointer to
* find the pointer to the next one in the list: */
pnext = p->next;
/* Find the sprite for this power type: */
s = state->powersprites[p->type];
/* Clear the old power away: */
draw_background(state, p->x, p->y, s->w, s->h);
/* Redraw any bricks we may have accidentally erased: */
draw_bricks(state, p->x, p->y, s->w, s->h);
/* Move it down: */
p->y += state->powerv;
/* If it has reached the bottom of the screen: */
if(p->y + s->h > state->canvasheight) {
/* Copy the erased region to the screen: */
draw_canvas(state, p->x, p->y - state->powerv,
s->w, s->h);
/* Destroy the power structure: */
destroy_power(state, p);
/* Check if it will collide with the bat: */
} else if(p->y + s->h > state->canvasheight - state->batheight
&& p->x + s->w > state->batx -
(state->batwidths[state->bat] / 2) &&
p->x < state->batx +
(state->batwidths[state->bat] / 2)) {
/* Copy the erased region to the screen: */
draw_canvas(state, p->x, p->y - state->powerv,
s->w, s->h);
/* Activate the relevant power: */
power_collision(state, p);
/* Destroy the power structure: */
destroy_power(state, p);
} else {
/* Redraw it in its new location: */
draw_power(state, p, p->x, p->y, s->w, s->h);
}
}
/* Redraw the ball in case we accidentally drew over it: */
redraw_ball(state);
/* Copy all the modified areas to the output window: */
for(p = state->powers; p; p = p->next)
draw_canvas(state, p->x, p->y - state->powerv, s->w,
s->h + state->powerv);
}
/* Make the current level active. This mainly consists of destroying the old
* background image and loading the new one, destroying the splash image,
* possibly loading a new splash image depending on the state, copying over the
* new level data into the current level state, then redrawing the entire game
* area. */
void set_level_active(nbstate *state)
{
int i;
level *lev;
grid *g, *gg;
int bgchanged;
sprite *s = NULL;
power *p, *pnext;
GR_PIXMAP_ID ctmp;
char *backgroundfile;
/* Destroy the old splash image sprite: */
destroy_sprite(state, state->splash);
/* If we're on the title screen: */
if(state->state == STATE_TITLESCREEN) {
/* Set the background file to the title background file: */
backgroundfile = state->titlebackground;
/* Set the tiled state appropriately: */
state->backgroundtiled = state->titlebackgroundtiled;
/* Try to load the title screen splash graphic (if it doesn't
* work nothing bad will happen- load_sprite() will print an
* error message and draw_splash() will not draw anything.) */
state->splash = load_sprite(state, state->titlesplash, -1, -1);
} else { /* Not on the title screen. */
/* Find the level structure for the current level number: */
for(lev = state->levels, i = 1; i < state->level;
lev = lev->next, i++);
/* Set the current number of bricks and background info: */
state->numbricks = lev->numbricks;
backgroundfile = lev->backgroundname;
state->backgroundtiled = lev->backgroundtiled;
/* If we're in the "game won" state, try to load the appropriate
* splash image: */
if(state->state == STATE_GAMEWON) {
state->splash = load_sprite(state, state->gamewonsplash,
-1, -1);
/* If we're in the "game lost" state, try to load the
* appropriate splash image: */
} else if(state->state == STATE_GAMELOST) {
state->splash = load_sprite(state,
state->gamelostsplash, -1, -1);
} else { /* We must be in the STATE_RUNNING state. */
/* No splash image: */
state->splash = NULL;
/* Copy this levels game grid into the current game
* grid: */
g = state->grid;
gg = lev->grid;
for(i = 0; i < state->width * state->height; i++)
*g++ = *gg++;
}
}
/* If there was a background filename specified: */
if(backgroundfile) {
/* If there is a current background sprite with a filename
* and the filename is the same as the new background
* filename, the background file has not changed. Otherwise,
* assume that it has. */
if(state->background && state->background->fname &&
!strcmp(backgroundfile,
state->background->fname))
bgchanged = 0;
else bgchanged = 1;
/* No background filename was specified, so assume it has changed (to
* a blank black frame): */
} else bgchanged = 1;
/* If the background image has changed, try to load the new one: */
if(bgchanged && !(s = load_sprite(state, backgroundfile, -1, -1))) {
/* If it fails, try to make a new empty sprite and colour it
* in black (the 16*16 pixels is purely arbitrary- make it too
* large and it uses a lot of memory, make it too small and
* we spend ages painting hundreds of tiny tiles onto the
* background. */
if(!(s = make_empty_sprite(state, backgroundfile, 16, 16))) {
/* If that fails too (shouldn't happen under normal
* circumstances), issue a warning and keep the old
* background image sprite: */
s = state->background;
} else {
/* Fill in the new dummy background black: */
GrSetGCForeground(state->gc, GR_COLOR_BLACK);
GrFillRect(s->p, state->gc, 0, 0, 16, 16);
/* Make it tiled. FIXME: it would make more sense to
* have a "no background image" option which simply
* coloured in the background black: */
state->backgroundtiled = 1;
}
}
/* If we have made a new background image sprite: */
if(bgchanged && s != state->background) {
/* Destroy the old one: */
destroy_sprite(state, state->background);
/* Set the background to the new sprite: */
state->background = s;
}
/* Empty the list of power boxes: */
for(p = state->powers; p; p = pnext) {
pnext = p->next;
free(p);
}
state->powers = NULL;
/* If fading has been requested, we want to fade the new level in, so
* swap the canvasses around so the current screen is the old canvas,
* then draw the new screen and make the new canvas, then start the
* process of fading it in: */
if(state->faderate) {
/* Swap the canvasses around: */
ctmp = state->oldcanvas;
state->oldcanvas = state->canvas;
state->canvas = ctmp;
/* Remember the state we're fading into: */
state->nextstate = state->state;
/* Go into the fading state: */
state->state= STATE_FADING;
/* Initialise the fade level as completely opaque: */
state->fadelevel = 256;
}
/* Clear the whole game area to the background image: */
draw_background(state, 0, 0, state->canvaswidth, state->canvasheight);
/* If we're not on the title screen or fading to the title screen: */
if(state->state != STATE_TITLESCREEN && !(state->state == STATE_FADING
&& state->nextstate == STATE_TITLESCREEN)) {
/* Draw the bricks: */
draw_bricks(state, 0, 0, state->canvaswidth,
state->canvasheight);
draw_scores(state); /* Draw the scores bar. */
draw_balls(state); /* Draw the row of balls. */
draw_bat(state); /* Draw the bat. */
/* Draw the current ball unless the game is over: */
if(state->state != STATE_GAMELOST &&
state->state != STATE_GAMEWON)
draw_ball(state);
}
draw_splash(state); /* Draw the splash graphic (if there is one). */
/* If we're fading, remember the new canvas and generate the first
* frame of the fade: */
if(state->state == STATE_FADING) {
/* Swap the canvasses around: */
ctmp = state->newcanvas;
state->newcanvas = state->canvas;
state->canvas = ctmp;
/* Reduce the opacity: */
state->fadelevel -= state->faderate;
/* Generate the first frame: */
GrCopyArea(state->canvas, state->gc, 0, 0, state->canvaswidth,
state->canvasheight, state->newcanvas, 0, 0, 0);
GrCopyArea(state->canvas, state->gc, 0, 0, state->canvaswidth,
state->canvasheight, state->oldcanvas, 0, 0,
GR_CONST_BLEND | state->fadelevel);
}
/* Copy the entire redrawn canvas to the output window: */
draw_canvas(state, 0, 0, state->canvaswidth, state->canvasheight);
}
